Screw driver features are added to make jobs easier and the tool more functional. In some cases the feature may be specific to a particular application while in other cases the feature is intended to make the tool easier to use in general purpose applications.

The Type of Screw Diver you need will be determined by the head pattern of the screw. Common patterns include: Phillips, Flat Head (also referred to as Slotted), Torx (also referred to as star), and Hex Head to name a few.